Another way to look at the difficulty in short term correlation. Notice the downtrend in data to march 07 preceded the bottom of the correction, as well as a 3 month rally. Likewise, although the last Friday report's initial reaction was down,
it preceded a strong 3 day rally. However, June and July numbers marked local tops in retrospect.
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Also, notice every reaction is not guaranteed to have a volatile response (ex.. jan/feb).